Illinois CNA State Practice Exam 2026 - Free CNA Practice Questions and Study Guide

Stool collection as a CNA requires that the sample be 1/2 teaspoon in size and must not be contaminated. This means that only a small amount of stool is needed for testing and it must be collected without any outside contaminants, such as urine or water. Option B is incorrect because it states that the sample can be contaminated, which goes against the required procedure. Options C and D are incorrect because they require a larger sample size of 1/2 cup, which is not necessary for testing and may be more difficult to collect for patients who are unable to produce that amount. Additionally, both options mention the sample being able to be contaminated, which again goes against the required procedure.